Car roof



JuneA 5, 1923.

C. D. BONSALL CAR ROOF Filqd DSC. 28 1922 Patented .lune 5, 1923.

CHARLES DAVID BONSiALL, OF PITTSBURGH, PENNSYLVANIA, SSIGNOR T0 P. .H.

MURPHY COMPANY, OF-NEW KENSINGTON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CAR ROOF.

Application led December 28, 1922. Serial No. 609,468.

T 0 all lwhom it may concern:

Be it known that L'CHARLES DAVID BON- sALL, a citizen of the United States, a resident of the city of Pittsburgh, county of Allegheny, and State of Pennsylvania, Vhave invented a certain new and useful Improvement in Car Roofs, of which the following is a specification.

This invention is an improvement on the invention set forth in my copending application Serial No. L114,302 filed October 2nd, 1920, and has for its principal objects to preserve the advantages of that type of roof and at the same time facilitate the manufacture and effect great economy of material. The invention consists principally in dis posing the roof sheets at two elevations and riveting the upper sheets to the top flanges and the lower sheets to the bottom flanges of suitable members that span from side plate to side plate and function as carlines. It also consists in the construction and arrangements hereinafter described and claimed.

In the accompanying drawing wherein like reference numerals refer to like parts wherever they occur,

Fig. 1 is a plan view of part of a car roof embodying my invention;

Fig. 2 1s a cross-section on the line 2-2 of Fig. 1;

Fig. 3 is a longitudinal vertical section on the line 3-3 of Fig. 1;

Fi 4: is a longitudinal vertical section on the line 4 4 of Fig. 1 and Fig. 5 is a longitudinal vertical section on the line 5--5 of Fig. 1.

The present roof comprises metal roof sheets 6 that span from side plate 7 to side plate 7 of the car and are preferably riveted, as at 8, to said side plates. The sheets are disposed at two different elevations, the sheets at the higher elevation alternating with those at the lower elevation. Between the adjacent edges of successive sheets are disposed relatively thick flanged members 9, whose ends are secured to the respective side plates and function as carlines. The webs or vertical portions of these carlines are vertically disposed; and the upper flanges thereof extend under the margins of the upper sheets respectively, and the lower flanges thereof extend over the margins of the lower sheets respectively. The lapping margins of the sheets are Lsecured to the flanges of the respective carlines by vertically disposed rivets 10, whereby the sheets and carlines are rigidly' secured together and caused to operate after the manner of the roof described in my said co ending application Serial No. L114,302. .Preferably the side edges 11 of the upper sheets are flanged or bent down along the vertical webs of the respective carlines in order to better exclude water from entering between said upper sheets and the stiffening or supporting carlines. For a similar reason the side edges 11 of the lower sheets are flanged upwardly alongside the vertical webs of the respective carlines.

Preferably the carline members are made of Z-section, that is, with the top flange extending in an opposite direction from that of the bottom flange. Also it is preferable to make the web portion of the carline member of greater depth at the ridge than atL the leaves and at the same time have the lower flangewiden from the. ridge to the eaves. This design of carline not only makes good use of the material for resisting stresses but also is adapted for economical manufacture from a rectangular'blank. In using carline members of the section just described, they are disposed in an alternate arrangement,

that is, the two carlines to which a single sheet is fastened, have their upper flanges turned toward each other and likewise the two carlines to which a single lower sheet is secured have their lower flanges turned toward each other. Thus, the flanges of successive carlines are reversely arranged.

The improvement hereinbefore described has several important advantages. First, the form ofthe sheet is greatly simplified and adapted for economical manufacture. Second, the use of a metal carline in lieuvof the vertical portion of the sheets of my previous application gives the designer great latitude in making provision for the contemplated stresses; and particularly, by concentrating the metal in the carlines to take care of the greater proportion of the vertical and torsional stresses, the designer can make use of sheets of lighter gauge and narrower width than would otherwise be practicable. Likewise, on account of the rivets being vertically disposed, the operation of riveting mamar riveting of horizontally disposed rivets. Another important advantage is the facility with which the roof may be assembled.

While the carline member of Z-seetion is especially adapted for use in my present roof, it is obvious that carlines of other section may be used there-for. Likewise, while there is considerable advantage in having the upper sheet separate and distinct from the lower sheet, it is obvious that such Z-shaped carline members might be used in connection with sheets of the type illustrated in my said application No. 414,302, wherein the same sheet has portions at two different levels connected by a vertical portion. ln Such case, the vertical portion or web of the carline member would lie latwise against the vertical connecting portion of the sheet, preferably with the adjacent portions of the sheets riveted to the respective flanges of the carline, that is, with the upper sheet resting on and riveted to the upper flange and the lower sheet under and riveted to the lower ange. What It claim is:

l. A metal car roof comprising carlinel inol lower anges respectively of said carmes.

2. A metal car roof comprising carline membershaving a Hat top portion and a flat bottom portion and` metal roof sheets alternately disposed substantially at the levels of the said top, and bottom portions and secured thereto respectively.

3. A metal car roof comprising carline members of Z-shaped section with alternate carlines having their ianges disposed in opposite directions, and metal roof sheets, alternate sheets resting upon and secured to the top Hanges ofV the carlines'and having their side marginal portions turned downwardly and the other sheets being under the lower flanges and having their side margins turned upwardly..`

A. A metal car roof comprising carline lmembers having upper and lower flanges, a

series of upper roof sheets resting on top ot' said upper fianges and secured thereto and having downturned side margins and a series of lower roof sheets underneath said lower flanges and secured thereto and liav- Y 

